If temperatures are below 32°F (0°C), operate the engine
at moderate speeds for 5 minutes before full loads are
applied.
Engine Idling - In Cold Weather
Avoid prolonged idling in ambient temperatures below
0°F (-18°C). Long periods of idling may be harmful to
your engine because combustion chamber temperatures
can drop so low that the fuel may not burn completely.
Incomplete combustion allows carbon and varnish to
form on piston rings and injector nozzles. Also, the
unburned fuel can enter the crankcase, diluting the oil
and causing rapid wear to the engine.
Stopping The Engine
Before turning off your turbo diesel engine, always
allow the engine to return to normal idle speed and run
for several seconds. This assures proper lubrication of
the turbocharger. This is particularly necessary after
any period of hard driving.
Idle the engine a few minutes before routine shutdown.
After full load operation, idle the engine 3 to 5 minutes
before shutting it down. This idle period will allow the
lubricating oil and coolant to carry excess heat away from
the combustion chamber, bearings, internal components,
and turbocharger. This is especially important for turbo-
charged, charge air cooled engines.
The following chart should be used as a guide in deter-
mining the amount of engine idle time required to
sufficiently cool down the turbocharger before shut
down, depending upon the type of driving and the
amount of cargo.
STARTING AND OPERATING
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5
Summary of Contents for 2008 Cherokee
Page 2: ......
Page 7: ...INTRODUCTION 7 1 ...
Page 10: ......
Page 103: ...UNDERSTANDING THE FEATURES OF YOUR VEHICLE 103 3 ...
Page 104: ...104 UNDERSTANDING THE FEATURES OF YOUR VEHICLE ...
Page 105: ...UNDERSTANDING THE FEATURES OF YOUR VEHICLE 105 3 ...
Page 186: ...INSTRUMENT CLUSTER Gasoline Engine 186 UNDERSTANDING YOUR INSTRUMENT PANEL ...
Page 187: ...Diesel Engine UNDERSTANDING YOUR INSTRUMENT PANEL 187 4 ...
Page 255: ...Lowering the DVD Screen Remote Control Location UNDERSTANDING YOUR INSTRUMENT PANEL 255 4 ...
Page 265: ...UNDERSTANDING YOUR INSTRUMENT PANEL 265 4 ...
Page 270: ...Operating Tips Chart 270 UNDERSTANDING YOUR INSTRUMENT PANEL ...
Page 317: ...STARTING AND OPERATING 317 5 ...
Page 386: ...ENGINE COMPARTMENT 3 7L 386 MAINTAINING YOUR VEHICLE ...
Page 387: ...ENGINE COMPARTMENT 4 7L MAINTAINING YOUR VEHICLE 387 7 ...
Page 388: ...ENGINE COMPARTMENT 5 7L 388 MAINTAINING YOUR VEHICLE ...
Page 389: ...ENGINE COMPARTMENT 3 0L DIESEL MAINTAINING YOUR VEHICLE 389 7 ...
Page 468: ......
Page 469: ...INDEX 10 ...